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Date: Sat, 5 Feb 2011 01:38:14 +0100
From: Ulf Magnusson <ulfalizer.lkml@gmail.com>
To: Rob Landley <rob@landley.net>
Cc: Randy Dunlap <rdunlap@xenotime.net>, linux-kbuild@vger.kernel.org,
        zippel@linux-m68k.org, mmarek@suse.cz, akpm@linux-foundation.org,
        andrea.gelmini@gelma.net, linux-kernel@vger.kernel.org,
        linux-doc@vger.kernel.org
Subject: Re: [PATCH] [ANNOUNCE] kconfig: Kconfiglib: a flexible Python
 Kconfig parser
Message-ID: <20110205003813.GB13060@ulf>
Mail-Followup-To: Ulf Magnusson <ulfalizer.lkml@gmail.com>,
	Rob Landley <rob@landley.net>, Randy Dunlap <rdunlap@xenotime.net>,
	linux-kbuild@vger.kernel.org, zippel@linux-m68k.org, mmarek@suse.cz,
	akpm@linux-foundation.org, andrea.gelmini@gelma.net,
	linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org
References: <20110201232750.GA30800@ulf>
 <20110204143529.f49e92e5.rdunlap@xenotime.net>
 <4D4C8EFA.40207@landley.net>
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On Fri, Feb 04, 2011 at 05:42:50PM -0600, Rob Landley wrote:
> On 02/04/2011 04:35 PM, Randy Dunlap wrote:
> >> The patch should be preferably be applied to a recent kernel, i.e. Linus's
> >> (2.6.38-rc3 at the time of writing).  Due to recent Kconfig changes, the
> >> kconfigtest.py test suite - which compares output character-for-character -
> >> will indicate failure on older (a few months old) kernels versions even though
> >> the outputs are functionally equivalent.
> >>
> >>  Documentation/kbuild/kconfig-language.txt |    5 +
> >>  Documentation/kbuild/kconfig.txt          |    8 +
> >>  README                                    |   13 +
> >>  scripts/kconfig/Makefile                  |   26 +-
> >>  scripts/kconfig/kconfiglib.py             | 3918 +++++++++++++++++++++++++++++
> >>  scripts/kconfig/kconfigtest.py            |  396 +++
> >>  6 files changed, 4365 insertions(+), 1 deletions(-)
> >>  create mode 100644 scripts/kconfig/kconfiglib.py
> >>  create mode 100644 scripts/kconfig/kconfigtest.py
> 
> Wait, I thought this was an extra standalone library.  Are you saying
> you want to make it so Linux will no longer compile on a build machine
> that doesn't have Python installed?

No - it's completely standalone, and should have no effect on things
that do not use Kconfiglib. The only changes besides adding the script
itself is to add two (well, three - there's one that's only used by
kconfigtest.py) targets to scripts/kconfig/Makefile that make it easier
to use the library by ensuring the environment is set up correctly.

> 
> If this is merely an extra developer tool ala bloat-o-meter and
> checkpatch.pl then it's merely uninteresting to me.  (I myself wrote a
> quick and dirty http://kernel.org/doc/make/menuconfig2html.py to
> generate http://kernel.org/doc/menuconfig/x86.html and friends years
> ago, and I still run it to update that once in a while.  There's not
> much to it.)
> 
> But adding new prerequities to a build machine would be really annoying
> for my use cases.
> 
> Rob

You would only need to have Python installed if you are going to use
Kconfiglib directly (hard to get around with a Python library).

/Ulf
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